CVE-2019-25600 — UltraVNC Viewer 1.2.2.4 Denial of Service via Buffer Overflow
UltraVNC Viewer 1.2.2.4 contains a denial of service vulnerability that allows attackers to crash the application by supplying an oversized string to the VNC Server input field.…
Published: 2026-03-22 · CVSS: 7.1 · CVSS 4.0
UltraVNC Viewer 1.2.2.4 contains a denial of service vulnerability that allows attackers to crash the application by supplying an oversized string to the VNC Server input field. Attackers can paste a malicious string containing 256 repeated characters into the VNC Server field and click Connect to trigger a buffer overflow that crashes the viewer.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7